地震作用下基于场地条件的高速列车行车安全性  

High Speed Train Running Safety Based on Field Condition Under Earthquake Action

作　　者：曾鹏毅[1] 张建经[1] 刘飞成[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《铁道建筑》2017年第8期128-132,共5页Railway Engineering

基　　金：四川省科技厅项目(2015SZ0068)

摘　　要：针对地震作用下高速列车行车安全性问题,基于多体动力学理论,采用多体动力学软件SIMPACK建立高速铁路车辆模型。采用日本实测地震数据,以脱轨系数、动态轮重减载率、轮轴横向力作为安全性评价指标,从车辆动态行为角度分析不同场地条件下列车速度、横向加速度峰值、垂-横向峰值加速度比对列车行车安全性的影响。研究结果表明:地震作用下列车行驶速度、横向加速度峰值、场地条件对列车行车安全性有显著影响;列车在Ⅲ类场地上行车安全性最差,而在Ⅰ类场地上最好;垂-横向峰值加速度比超过0.67以后,垂向激励对列车行车安全性有显著影响。建议高速铁路地震报警阈值的选取应基于场地条件,且应考虑近场地震作用下垂向激励的影响。Based on multi- body dynamics theory and multi- body dynamics software SIMPACK, high speed railwaytrain model was built to analysis the running safety of high speed train under earthquake action. Japanese seismic datawere used, and derailment coeff icient, dynamic wheel reduction ratio and lateral wheelset force were chosen as thesafety evaluation index in this paper. From the point of vehicle dynamic behavior, the inf luences of railway train speed,lateral acceleration peak, and the ratio of vertical peak acceleration and lateral peak acceleration on the running safetywere analyzed based on different field conditions. The results show that the railway train speed, lateral accelerationpeak and field condition have signif icant inf luences on the running safety . The train running safety is worst in fieldcondition and is best in f ield condition. The effect of vertical excitation can＇t be ignored when the ratio of vertical-lateral peak acceleration is beyond 0. 67. It is suggested that the field condition and vertical excitation of near sourceearthquake should be taken into consideration in the earthquake alarm threshold of high speed railway .

关 键 词：高速铁路 行车安全性 地震作用 多体动力学 场地条件 垂-横向加速度比 

分 类 号：U211.9[交通运输工程—道路与铁道工程] U270.11[机械工程—车辆工程]